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  • Simon Willison’s Weblog: Cursor: Security

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    Kurt Seifried
    in

    Source URL: https://simonwillison.net/2025/May/11/cursor-security/#atom-everything Source: Simon Willison’s Weblog Title: Cursor: Security Feedly Summary: Cursor: Security Cursor’s security documentation page includes a surprising amount of detail about how the Cursor text editor’s backend systems work. I’ve recently learned that checking an organization’s list of documented subprocessors is a great way to get a feel for how everything…

  • Simon Willison’s Weblog: Trying out llama.cpp’s new vision support

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/May/10/llama-cpp-vision/#atom-everything Source: Simon Willison’s Weblog Title: Trying out llama.cpp’s new vision support Feedly Summary: This llama.cpp server vision support via libmtmd pull request – via Hacker News – was merged earlier today. The PR finally adds full support for vision models to the excellent llama.cpp project. It’s documented on this page, but the…

  • Simon Willison’s Weblog: Gemini 2.5 Models now support implicit caching

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/May/9/gemini-implicit-caching/#atom-everything Source: Simon Willison’s Weblog Title: Gemini 2.5 Models now support implicit caching Feedly Summary: Gemini 2.5 Models now support implicit caching I just spotted a cacheTokensDetails key in the token usage JSON while running a long chain of prompts against Gemini 2.5 Flash – despite not configuring caching myself: {“cachedContentTokenCount": 200658, "promptTokensDetails":…

  • Simon Willison’s Weblog: Quoting Claude’s system prompt

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/May/8/claudes-system-prompt/#atom-everything Source: Simon Willison’s Weblog Title: Quoting Claude’s system prompt Feedly Summary: If asked to write poetry, Claude avoids using hackneyed imagery or metaphors or predictable rhyming schemes. — Claude’s system prompt, via Drew Breunig Tags: drew-breunig, prompt-engineering, anthropic, claude, generative-ai, ai, llms AI Summary and Description: Yes Summary: The text pertains to…

  • Simon Willison’s Weblog: Introducing web search on the Anthropic API

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/May/7/anthropic-api-search/#atom-everything Source: Simon Willison’s Weblog Title: Introducing web search on the Anthropic API Feedly Summary: Introducing web search on the Anthropic API Anthropic’s web search (presumably still powered by Brave) is now also available through their API, in the shape of a new web search tool called web_search_20250305. You can specify a maximum…

  • Simon Willison’s Weblog: Create and edit images with Gemini 2.0 in preview

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/May/7/gemini-images-preview/#atom-everything Source: Simon Willison’s Weblog Title: Create and edit images with Gemini 2.0 in preview Feedly Summary: Create and edit images with Gemini 2.0 in preview Gemini 2.0 Flash has had image generation capabilities for a while now, and they’re now available via the paid Gemini API – at 3.9 cents per generated…

  • Simon Willison’s Weblog: Medium is the new large

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/May/7/medium-is-the-new-large/#atom-everything Source: Simon Willison’s Weblog Title: Medium is the new large Feedly Summary: Medium is the new large New model release from Mistral – this time closed source/proprietary. Mistral Medium claims strong benchmark scores similar to GPT-4o and Claude 3.7 Sonnet, but is priced at $0.40/million input and $2/million output – about the…

  • Simon Willison’s Weblog: llm-prices.com

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/May/7/llm-prices/#atom-everything Source: Simon Willison’s Weblog Title: llm-prices.com Feedly Summary: llm-prices.com I’ve been maintaining a simple LLM pricing calculator since October last year. I finally decided to split it out to its own domain name (previously it was hosted at tools.simonwillison.net/llm-prices), running on Cloudflare Pages. The site runs out of my simonw/llm-prices GitHub repository.…

  • Simon Willison’s Weblog: Saying "hi" to Microsoft’s Phi-4-reasoning

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    Kurt Seifried
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    Source URL: https://simonwillison.net/2025/May/6/phi-4-reasoning/#atom-everything Source: Simon Willison’s Weblog Title: Saying "hi" to Microsoft’s Phi-4-reasoning Feedly Summary: Microsoft released a new sub-family of models a few days ago: Phi-4 reasoning. They introduced them in this blog post celebrating a year since the release of Phi-3: Today, we are excited to introduce Phi-4-reasoning, Phi-4-reasoning-plus, and Phi-4-mini-reasoning – marking…